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Dr. David Winston (cq, left) with assistants Krystal Poulin (cq, second-left), Marcie Yates (cq, second-right) and Louie Goad (cq, right) work on an autopsy of the corpse of a presumed migrant found on the Tohono O'odham reservation near Cockleburr Village on August 2,2009 at the Pima County Medical Examiners office in Tucson, Arizona, Wednesday, August 5, 2009. The person is thought to be a man and an identification card was found 30 feet from the body which might be his. ..PHOTOS/ MATT NAGER